I can't get my new Airtronics MT-4 to calibrate with a VTX10. It worked fine with a Spektrum. I have it narrowed down to the esc not calibrating like I expect it, it's not going through the steps the instructions say should occur.

I press the button to turn the esc on for three seconds, and the thing beeps and lights up the lights the instructions say should...and that's as far as I can get anything to go. I pull throttle for one second, but no response from the esc. I pull the throttle for three seconds, and the same.

The ratio is all set to 100% epa and the like.

The MT-4 with a Tekin fired up just fine.